The official website of the Gakuen Babysitters TV anime has revealed that the seventh and final Blu-ray and DVD volume will bundle an OVA titled "Sono 13" on its September 26 release. The volume will also include a video of the March 4 event held at the Sanrio Puroland in Tokyo.

The episode will adapt a story from the ninth volume of the manga, where Ryuuichi makes curry for the chairwoman of the Morinomiya Academy and Saikawa; as well as a special "Snow White" chapter from the manga's sixth volume. The OVA will be pre-screened at the "Gakuen Babysitters Morinomiya Gakuen-sai" special event at the TFT Hall 1000 venue in Tokyo on August 26. The main cast members will attend the event for a talk show.

The seventh Blu-ray and DVD volume will further bundle an audio drama based on the fairy tale of Kaguya-hime from eighth manga volume with cast comments, an illustration sheet drawn by the original author Hari Tokeino, a liner note "Morinomiya Babysitting Room Diary," and an interview with Tomoko Miyadera, who voices the chairwoman of the Morinomiya Academy, Yoko Morinomiya.

Gakuen Babysitters adapts the slice of life comedy manga of the same title, which has been serialized since in Hakusensha's LaLa magazine since September 2009 with 17th volumes in print as of March 5. The 12-episode anime adaptation by Brains Base premiered on January 7 and concluded on March 25.